Fluid pump structure



Feb. 24,1 1931. SCHNElDER 1,793,513

FLUID PUMP STRUCTURE Filed April 22, 1929 "J :TNZENTOR. @vafi ATTORNEYS.

Patented Feb. 24, 1931 i LUNITED sTAT sfPArENioFFIcE- ALFRED SCHNEIDER,or BERKELW, camromvra nssrenoa To LIBERTY BURN-ER" 4 CORPORATION, OF SANFRANCISCO, GALIFORNTA, A CORPORATION OF DELAWARE FLUID PUMP swarm-1mApplication filed April 22,

This invention relates to fluid pumps and particularly to a pumpdesigned for use with liquid fuel oil burners.

. Among its objects, the invention provides a self priming pump, one ofthe double valve type, wherein two separate bodies of fluid are incommunication through valve controlled ports and are maintained flowingby the operation of a pump mechanism. A further 1 object is to provide apump structure having a simple valve and seat structure in the checkvalve chamber thereof. Further objects, are to provide a novel form ofpump structure secured in position to the valve mechanism in aparticular manner which-promotes simplicity and 'cheapness in structure,and to provide a fluid accumulating chamber connected with the fluidinlet of the valve structure.

With the above mentioned and other objects in View, the inventionconsists in the novel construction and combinatonof parts hereinafterdescribed, illustrated in the accompanying drawings and pointed out inthe claim hereto appended; it being understood that various changes inthe form, proportion, size and minor details of construction within thescope of the claim may be resorted to without departing from the spiritor sacriso ficing any of the advantages of the invention. To moreclearly comprehend the invention, reference is directed to theaccompanyingdrawing, wherein The figure is a. view in vertical centralsection of one embodiment of my invention.

In the drawing, 1 indicates a body preferably of elongated, cylindricalstructure, and normally disposed in a vertical or upright position. Thebody is preferably of metal and on its interior is recessed downwardlyfrom its upper end at 2 for approXimately one-half of its length, therecess being formed at its upper end through its side wall with a fluiddischarge 3, and at its lower end through its side wall with a fluidinlet 4, the latter opening into the center of the base or bottom of thechamber at 5. The bottom wall of the body is provided with one or moreflow passages 6' extending vertically there-' through. Attached to thelower end of the 1929; serial N'of 357,015.

body 1, preferably in a permanent manner, I

is the upper end of a pump cylinder 6 of the lienally expansible andcontractable type,

circumferentially bellowsed and commonly x by a cupped part 9 threadablypositioned within the recess through its upper open end and formed withpassages 10 therethrough.

The periphery of-the cup in-member 9 affords a valve seat 11 and a valvestem guide 12 is provided in its base; The upper end of recess 2 isclosed by a removable "plug 13 body and formed on its underside witha'valve' stem guide.

threaded into the WVithin the respective chambers 7 and 8 are mountedthe spring seated check valves 14 and 15 of duplicate structure, thevalve 14 seating on 11 and the valve15 seating-'21s at 16 a A tubularextension 17 is threaded into inlet 4 with its inlet 18 downwardly dis-'posed. The extension 17 passes'through a member 19. and holds the samein position to thebody 1. The member 19 is disposed parallel with body.1 and extends above and below theinlet 4, its interior affording afluid accumulating chamber 20 having a screened fluid inlet 21 at itslower end.

On its expansion or suction stroke the cylinder 6 draws fluid into thechamber 20 through 18 and 4 and lifts valve 15. The fluid passes intochamber 8 and into the cylinder 6, and all compartments below valve 14are substantially filled. On the compression stroke, the fluid incylinder 6 and chamber 8 is displaced and is forced into chamber 7 andout through discharge 3, after lifting valve 14.

It will be observed that the arrangement of the valves and chambersprovides a self priming. structure of positive and efficient operation,which is simple in construction and which will handlefluidseconomically.

I claim 1 The combination with a reciprocating pump, of a pump structurecomprising arecessed .body having a passage between the closed'end ofthe recess and the pump, said body being provided with intake anddischarge passages opening upon the closed and open end portions of therecess respectively, a removable ported Wall positioned within therecess between the intake and discharge passages, a valveslidablymounted in the removable Wall and adapted to seat over the intakepassage, a valve slidably mounted in;

the open end of the recess, and a closure for the open end. a I i Intestimony whereof Ihave name to this specification.

- ALFRED SCHNEIDER.

signed my

